Otolaryngology Book

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Perilymphatic Fistula

Aka: Perilymphatic Fistula, Hennebert's Sign
  1. Definition
    1. Communication between inner and middle ear
  2. Causes
    1. Direct blow to ear
    2. Scuba related barotrauma
    3. Excessive straining on stooling, lifting, sneezing
  3. Pathophysiology
    1. Peripheral Cause of Vertigo
  4. Symptoms
    1. Vertigo
    2. Associated with Hearing Loss
  5. Signs: Hennebert's Sign
    1. Pressure applied to tragus and external auditory meatus
      1. Pneumatic Otoscopy may also induce
    2. Results in Vertigo or Nystagmus when fistula present

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